Lower-limb prosthesis force and moment transducer
First Claim
1. A transducer, comprising:
- a transducer body;
an adaptor on the transducer body for coupling to a prosthesis;
first and second strain-measuring devices positioned, respectively, on anterior and posterior sides of the adaptor to measure forces in a first plane; and
third and fourth strain-measuring devices positioned, respectively, on right and left sides of the adaptor to measure forces in a second plane substantially orthogonal to the first plane;
wherein the first and the second strain-measuring devices and the third and the fourth strain-measuring devices are arranged to measure right/left and anterior/posterior bending moments and reduce measuring forces in a third plane orthogonal to the first and second planes.
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Reexamination
Accused Products
Abstract
A computerized prosthesis alignment system includes a transducer that can measure socket reactions in the anterior/posterior plane and the right/left planes, while canceling or reducing the transverse forces on the measurements of these socket reactions. In addition, the transducer is also capable of determining the axial load or weight experienced by the prosthesis. The computerized prosthesis alignment system is in communication with a host computer. The moment data from the transducer is interpreted by the user via a computer interface. The host computer includes memory for storing one or more applications. These applications receive data from the transducer, interpret the data with discrete algebraic or fuzzy logic algorithms, and display the output numerically and graphically. Applications may also interpret the data to provide analyses to the user for aligning the prosthesis.
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Citations
16 Claims
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1. A transducer, comprising:
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a transducer body; an adaptor on the transducer body for coupling to a prosthesis; first and second strain-measuring devices positioned, respectively, on anterior and posterior sides of the adaptor to measure forces in a first plane; and third and fourth strain-measuring devices positioned, respectively, on right and left sides of the adaptor to measure forces in a second plane substantially orthogonal to the first plane; wherein the first and the second strain-measuring devices and the third and the fourth strain-measuring devices are arranged to measure right/left and anterior/posterior bending moments and reduce measuring forces in a third plane orthogonal to the first and second planes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A transducer for coupling to a prosthesis, comprising:
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a transducer body; an adaptor on the transducer body for coupling to a prosthesis; means for measuring moments in the anterior/posterior plane and the right/left plane, and reducing measuring moments in the transverse plane, wherein said means comprises first and second strain-measuring devices positioned, respectively, on anterior and posterior sides of the adaptor and third and fourth strain-measuring devices positioned, respectively, on right and left sides of the adaptor.
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Specification